If this sounds like an upgrade you’re willing to perform, you’ll be happy to hear the Screamin’ Eagle Milwaukee-Eight 131 Crate Engine runs $6,195 for the oil-cooled version, and $6,395 for the Twin-Cooled. The Screamin’ Eagle Milwaukee-Eight 131 engine will be available in two finish options as well: Black and Chrome or Black and Gloss Black. However, it will not fit any H-D Trike models